Wire is new, here is a pic of the assembly.
https://photos.app.goo.gl/LRAeVDfRDTbCPFYm7
I did pull the wire from the horn button, horn continued to blow
I then pulled the twist lock assembly (wire/contact/spring), horn no longer blows.
Here is a few more pics:
https://photos.app.goo.gl/gnRntAT1A28HFxiJ8
https://photos.app.goo.gl/AZKBKQRiqQHiXa2U7
https://photos.app.goo.gl/EYed8yQDZmpSu7d18
https://photos.app.goo.gl/XJw4xPMjPdFATHBg6